Pressure-regulator for cane-mills



(No Model.)

" J. BUCHEL.

- PRESSURE REGULATOR POR GANE MILLS. No. 497,301. Patented May 16,1893.

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NrTED STATES PATENT OEErcE.

JULES BUCIIEL, OF NE ORLEANS, LOUISIANA.

PRESSURE-REGULATOR FOR CANE-MILLS.

SPECIFICATION forming part of Letters Patent No. 497,301, dated May 16,1893.

Application filed August 17, 1892. Serial No. 443,343. (No modelJ .Toall whom t may cm2/cern:

Be it known that I, JULES BUOHEL, a citizen oi' the United States ofAmerica, residing at New Orleans, in the parish of Orleans and State ofLouisiana, have invented certain new and useful Improvements inPressure-Regulators for Cane-Mills, of which the following 1s aspecification, reference being had therein to the accompanying drawing.

My invention relates to hydraulic pressure regulators for cane mills orother devices in whlch heavy crushing rolls are used, and has for ltsobject to provide means whereby the pressure of the rolls upon eachother is kept constant by the direct pressureof ammonia or othersuitable gas in a high state of tension.

Another object of my invention is to regulate the tension of theexpansible gas or vapor by means of heat from the steam from the boiler.

My invention also consists in certain novel features of detailedconstruction which will hereinafter be more fully described and claimed.

U In all machinery of this class it is very desirable that the pressureof the rolls upon each other should be constant for all conditions ofthe feed, that is Whether the machine is being worked to its fullestcapacity or whether only a small quantity of feed is passing through therolls. T-o attain this object one or more of the rolls are usually setin adjustable bearings and various means have been employed forregulating the pressure on these bearings.

I will now more particularly describe my invention reference being hadto the accompanying drawing which shows a cane mill in elevation with myimproved regulator attached, shown mostly in section.

The style of mill, A, here shown is that in which three rollers areused, the top one having the adjustable bearings carried by the kingbolts, B, B, which extend down through the housing and bed plate of themill. On

-steam jacket b. Steam from the boiler is led to the steam jacket bthrough pipe W which contains valve T and an ordinary steam pressureregulator S. A pop safety valve is placed at O and a three way cock at Rso that by a quarter turn the steam may be shut ott and allowed todischarge from the steam jacket to the atmosphere through pipe Y. A pipecontaining a valve N is attached at the top of the ammonia pressurecylinder through which the supply of anhydrous ammonia is introducedinto the cylinder. y

J is an ordinary piston valve working in the cylinder I. On its top andbottom are placed a number of leather washers, c, 0,0, held to thepiston by the bolt d. The seat a of the piston valve is formed by theextension of the stand pipe up into the cylinder I. The said extensionis tapered so as to be smaller than the cylinder and leave anannularspace, g, surrounding the valve seat, a, which will remain lledwith the oil when the valve descends upon the seat, a, and thus preventany leaking of the ammonia at the joint of the head of the cylinder.

The object of the washers bolted to the piston valve is to make aperfectly tight joint when the valve is on its seat and also to preventthe valve or seat from being injured. should the valve move up or downtoo suddenly.

As the ammonia is heated in the cylinder I it exerts an immense pressureupon the oil in the stand pipe H which is transmitted to the hydraulicrams. The piston valve .I is not needed for the transmission of thepressure but is used to prevent any escape of the ammonia in case theoil should fall below the top of the stand pipe from leakage or an othercause. i

Gage P is graduated to register the steam pressure in the steam jacket bas controlled by the pressure regulator S, and the gage also has anothergraduated are which gives the relative pressure of the ammonia in there- ICO ceiver I due to the temperature of the steam in the jacket whichis always constant andin proportion to the steam pressure. Steam in thejacket b at 212o Fahrenheit or atmospheric pressure will by itstemperature raise the pressure ot' the ammonia in cylinder I to aboutone thousand pounds per square inch, thus the double graduated dial Pgives both the pressure of the steam in jacket b and pressure of ammoniain cylinder I. The number of pipe connections to the pressure cylinderis thus reduced to one, namely that at N, directly through the top andthe liability to leakage and the great expense of making these jointsare very much reduced.

At-K is shown an ordinary float valve and chamber for regulating thedischarge of the water of` condensation from the steam jacket, throughpipe NV.

Thfeoperation of my device is as followsz The hydraulic cylinders C,pipes G and stand pipe H are filled with a certain amount of suitableheavy oil sufficient to raise the piston valve J a couple of inches orso rvfrom its seat in the cylinder I. The ammonia valye N is thenconnected with a cylinder containing liquefied ammonia and a couple ofpounds of the liquid are allowed to flow in, after which the valve isclosed and hermet-ically sealed. The ammonia at summer temperature has apressure from two hundred to three hundred i' pounds per square inchwhich will exist as long as there is any liquefied ammonia in cylinderI. The pressure regulator S is now set so as -to give the desired steampressure and the corresponding temperature in the jacket,

` g' b'. The steam is then turned on and by its heat raises the pressureof the ammonia from two hundred to three hundred pounds any- Where fromone thousand to five thousand pounds per square inch which is indicatedby the double graduated gage P, and regulated to any desired amount bythe pressure regulator S. This inner pressure in the ammonia cylinderreacts directly upon the oil below which transmits it to the plungers D,and by means of the king bolts the upper roller is pressed against theother two. This pressure remains practically constant While the rollersvary in distance apart due to different conditions ot' the feed. Theexpansibility and compressibility of the gas in chamber I allow for anyirregularities of this kind without subjecting the machine to any suddenshocks and lessen very much the danger of breaking at the same timekeeping an even and Y steady pressure on the rollers.

ment ot' the rolls as they move toward or recede from each otheraccording as there is more or less feed passing through the mill.

In vapor motors or power generators it is necessary that the pressureshould be varied, that is alternatelyincreased and decreased or releasedin order to produce motion. But the essential feature in my process isthat the pressure resulting from the expansion of the volatile liquidmust be maintained substantially constant and stationary in order thatthe rolls may be constantly subjected to an even pressure. Thus thevapor under tension in the pressure cylinder acts merely as a staticpressure or a passive medium being entirely actuated by the force of themill seeking relief. This static pressure takes the place of a weight orspring and is compressed or expanded according to the irregular movementof the rolls. When the mill is started at the beginning olf theoperation, the pressure in the cylinder I is set atacertain amount,suitable to the quality of the cane or feed and this pressure is notmaterially varied throughout the operation of the machine.

Having now described my invention, what Iclaim as new, and desire tosecure by Letters Patent, is-

l. In a pressure regulator for cane mills, the combination of the standpipe H connected to the hydraulic ram, the pressure cylinder I supportedon said stand pipe, the steam jacket b surrounding the pressurecylinder, the steam supply pipe IV connected to the steam jacket, andthe valve T in said pipe, whereby the supply of steam to the jacket maybe controlled, substantially as described.

2. In a pressure regulator for cane mills stand pipe H connected to ahydraulic ram, the pressure cylinder supported on said stand pipe, thesteam jacket around said cylinder and the piston valve J working in thecylinder whereby the upper end ofthe stand pipe may be closed,substantially as described.

3. In a pressure regulator for cane mills the stand pipe H connected tothe hydraulic ram, the steam jacketed pressure cylinder supported onsaid stand pipe, the extension a, of the stand pipe within the cylinderforming a valve seat, the surrounding annular space g, and the pistonvalve, substantially as described.

4. In a pressure regulator for cane mills, the stand pipe H, connectedto the hydraulic ram, the double graduated dial gage M connected to saidstand pipe as described, the pressure cylinder I, the piston valve Jworking in said cylinder, the steam jacket o around the cylinder, thesteam pipe W, and the steam pressure regulator S in 'said pipe, wherebya certain pressure of steam may be maintained in the steam jacketsubstantially as described.

5. In a pressure regulator for cane mills the steam j acketed ammoniapressure cylinder having the opening at the top controlled by theammonia valve N, steam pipe W connected to the jacket b and containingthe press- IOO ure regulator S, and the stand pipe H connected with thehydraulic ram as set forth.

6. In a pressure regulator for cane mills the combination of the standpipe H. supporting" the steam jacketed ammonia pressure cylinder, thesteam pipe connected to the jacket and containing the pressure regulatorS, the three way cock R and the double graduated pressure gage P wherebythe pressure in the steam jacket b and in pressure cylinder I are bothindicated substantially as set forth.

7. In a pressure regulator for cane mills the combination of the standpipe H connected to the hydraulic ramby pipes G, the steam jacketedammonia pressure cylinder, piston valve J and seat A in said cylinder,steam pipe W containing pressure regulator S, three way cock R, thedouble graduated gage P and safety valve O and the float valve andchamber K for the discharge of the water of condensation substantiallyas set forth.

8. Thehereindescribed process of maintaining a constant and regularpressure on the rolls of a cane or other mill, which consists indirecting the forces produced by the irregular movements of the rolls,upon a confined heavy liquid, subjecting a certain amount of connedvolatile liquid to a predetermined `degree of heat, maintaining theresulting pressure substantially constant and stationary and rectlyagainst the conned vapor so thatit will be compressed or allowed toexpand according to the irregularities of the' feed.

9. The herein described method of maintaining a constant pressure upontherolls of J ULES` BUCHEL.

Witnesses:

HENRY J. RHODES, E. F. BUCHEL.

, directing the motion of the heavy liquid dil

